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Troubleshooting by Indication on the Remote Controller
SiUS30-1301
182
Service Diagnosis
3.19 Actuation of High Pressure Switch
Error Code
E3
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
The error is detected by the protection device circuit that detects continuity at high pressure switch.
Error Decision
Conditions
When the protector circuit is partially opened
(Reference) Operating pressure of high pressure switch
Operating pressure: 580 psi
Reset pressure:
435 psi
Supposed
Causes
Actuation of condensing unit high pressure switch
Defective high pressure switch
Defective condensing unit main PCB (A1P)
Instantaneous power failure
Defective high pressure sensor
Troubleshooting
N
O
YES
YES
YES
Are the 3 points
a
b
o
v
e OK?
Is the
high press
u
re
s
w
itch operating
v
al
u
e
normal (i.e., 5
8
0
psi)?
Does the stop
d
u
e to error “
E3
” rec
u
r?
N
O
N
O
YES
Are the
characteristics of
the high press
u
re sensor
normal?
(
*
1.)
N
O
Check for the points sho
w
n
b
elo
w
.
Is the stop
v
al
v
e open?
Is the high press
u
re s
w
itch connector properly
connected to the condensing
u
nit main PCB?
Does the high press
u
re s
w
itch ha
v
e contin
u
ity?
Rectify the defecti
v
e points, if
any.
Mo
u
nt a press
u
re ga
u
ge on the high press
u
re
ser
v
ice port.
Reset the operation
u
sing the remote
controller, and then restart the operation.
Replace the high press
u
re s
w
itch.
Replace the high press
u
re sensor.
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
A